1993年中国古代科技发明发现(第2组)纪念银币22克全套5枚 NGC PF 69
CHINA. 5 Piece Proof Set, 1993. Inventions & Discoveries Series. NGC PROOF-69 ULTRA CAMEO.Fr-62; KM-PS44. 25 Yuan pieces struck in platinum. With case of issue and certificates of authenticity. From mintages of only 100 pieces each. All piecesNGC PROOF-69 ULTRA CAMEO.